The most popular Fenix battery just got upgraded! Please welcome the Fenix ARB-L18-3500U USB rechargeable li-ion battery! The ARB-L18-3500U battery can be charged by its own USB port and by the charger as well. A protective circuit is built into the anode and covered with a riveted steel hat. The battery is fully covered with the steel shell, thus the potential risk of short circuiting caused by collision or impact is hugely eliminated!!

Features:

• Micro USB charging port lets you charge the battery directly or in a charger
• Protection circuit in the Anode to prevent short circuit
• Multiple layers of protection
• 500 charge cycles can be expected from a properly maintained battery.
• Fully covered with a riveted steel shell for impact resistance
• Over charge, discharge, short circuit, and over heating protection